Marek's disease (MD) is a lymphoproliferative disorder caused by Gallid herpesvirus 2 (MDV) that infects mainly domestic gallinaceous birds although wild birds may occasionally be affected. The current report describes the anatomopathological and molecular findings of a case of MD in a white-peafowl (Pavo cristatus). The signs included apathy, hyporexia, and diarrhea. Grossly, 0.5 to 1.5cm in diameter, yellow, soft nodules were observed in the skeletal muscle, lung, kidney, air sacs, small intestine, heart, ovary, ventriculus, and proventriculus. Microscopically, numerous atypical round neoplastic cells were noted. The molecular detection of MDV DNA was implemented to amplify part of the meq gene and products were sequenced for the phylogenetic analysis. Template DNA was obtained from tissues of the affected bird and from blood of all the gallinaceous birds of the Zoo. The expected amplicon for the partial amplification of MDV meq gene was obtained and the amplicons were sequenced. Sequences obtained enabled grouping the strain (accession no. KT768121) with MDV serotype 1 strains from the GenBank. Based on the anatomopathological and molecular findings, the diagnosis of MD in a whitepeafowl was reached, and to the authors' knowledge, no previous report regarding MD was published in Pavo cristatus.Keywords: Marek's disease, lymphoma, oncogenic virus, MDV, herpesvirus -chave: doença de Marek, linfoma, vírus oncogênico, MDV, herpesvírus RESUMO Doença de Marek (MD) é uma desordem linfoproliferativa causada pelo Gallid herpesvirus 2 (MDV), que infecta principalmente galináceos domésticos, porém aves silvestres podem ser ocasionalmente afetadas. O presente relato descreve os achados anatomopatológicos e moleculares de um caso de MD em um pavão-branco (Pavo cristatus Palavras
A pandemia do COVID-19, deflagrada no início de 2020, foi acompanhada por rápida disseminação, taxas de mortalidade sem barreiras sociais e uma corrida científica sem precedentes.Neste cenário mundial o Brasil tem lugar de destaque, pois é o 11º país que mais produziu artigos sobre o assunto. Este e-book tenho o objetivo de expor as pesquisas epidemiológicas, revisões científicas, estudos experimentais pré-clínicos, observacionais e clínicos sobre o assunto COVID-19 -O VÍRUS QUE MOVIMENTOU A CIÊNCIA.Esperamos que tenha uma leitura agradável e possa desfrutar ao máximo o conhecimento transmitido por nossos autores.
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